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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Activity, short-term stability (poisoning tolerance) and durability of carbon supported Pt-Pr catalysts for ethanol oxidation

Full text
Author(s):
Corradini, Patricia G. [1] ; Antolini, Ermete [2] ; Perez, Joelma [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Paulo - Brazil
[2] Scuola Sci Mat, I-16016 Genoa - Italy
Total Affiliations: 2
Document type: Journal article
Source: Journal of Power Sources; v. 251, p. 402-410, APR 1 2014.
Web of Science Citations: 10
Abstract

Pt-Pr/C electrocatalysts were prepared by a modified formic acid method, and their activity for carbon monoxide and ethanol oxidation, their short term stability and durability were compared to that of commercial Pt/C and Pt-Sn/C (3:1) catalysts. By derivative voltammetry (DV) it was found that ethanol electro-oxidation takes place by two main pathways at different potentials. It was observed that, in the presence of Pr, ethanol electro-oxidation takes place mostly through the pathway at lower potential, which is the most interesting for fuel cell application. The Pt-Pr/C catalysts were less tolerant to poisoning by ethanol oxidation intermediate species than Pt/C. Durability test by a repetitive potential cycling under Ar atmosphere revealed a good structural stability of Pt-Pr/C catalysts. A repetitive potential cycling under CO atmosphere carried out on the Pt-Pr/C (1:1) catalyst, instead, indicated a structural change, likely by formation of a core shell structure. (C) 2013 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 10/20045-0 - Fuel cells: contributions to the development of catalysts and to the understanding of scaling up problems
Grantee:Joelma Perez
Support type: Regular Research Grants
FAPESP's process: 12/12189-8 - Investigation of platinum-rare earth nanocatalysts supported in carbon for direct ethanol fuel cells
Grantee:Patricia Gon Corradini
Support type: Scholarships in Brazil - Doctorate